Home / 13,369.48-18,430.65-9,378.22

Finding the Fourth Proportional to 13,369.48, 18,430.65 and 9,378.22

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Solution

The fourth proportional to 13,369.48, 18,430.65 and 9,378.22 is: 12,928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,369.48 : 18,430.65 = 9,378.22 : x
  2. Step 2: Convert to fraction form
    13,369.48/18,430.65 = 9,378.22/x
  3. Step 3: Cross multiply
    13,369.48x = 18,430.65 × 9,378.22
  4. Step 4: Simplify right side
    13,369.48x = 172,846,690.44
  5. Step 5: Solve for x
    x = 172,846,690.44/13,369.48
  6. Step 6: Final answer
    x = 12,928.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.